linux-kernel - Re: [RFC][PATCH] PM / Sleep: Freeze filesystems during system suspend/hibernation

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Message-ID: <CA+5PVA50UA1oP1jKgnQjHh8APp=cNWREw3bkfrkV1OW_Tg1g+A@mail.gmail.com>
Date:	Fri, 25 May 2012 12:55:10 -0400
From:	Josh Boyer <jwboyer@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linux PM list <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, Jan Kara <jack@...e.cz>,
	linux-fsdevel@...r.kernel.org, Dave Chinner <david@...morbit.com>,
	Nigel Cunningham <nigel@...onice.net>,
	Pavel Machek <pavel@....cz>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Subject: Re: [RFC][PATCH] PM / Sleep: Freeze filesystems during system suspend/hibernation

On Fri, Feb 17, 2012 at 3:59 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
>> commit b94887bbc0621e1e8402e7f0ec4bc3adf46c9a6e
>> Author: Rafael J. Wysocki <rjw@...k.pl>
>> Date:   Fri Feb 17 12:42:08 2012 -0500
>>
>>     Freeze all filesystems during system suspend and (kernel-driven)
>>     hibernation by calling freeze_supers() for all superblocks and thaw
>>     them during the subsequent resume with the help of thaw_supers().
>>
>>     This makes filesystems stay in a consistent state in case something
>>     goes wrong between system suspend (or hibernation) and the subsequent
>>     resume (e.g. journal replays won't be necessary in those cases).  In
>>     particular, this should help to solve a long-standing issue that, in
>>     some cases, during resume from hibernation the boot loader causes the
>>     journal to be replied for the filesystem containing the kernel image
>>     and/or initrd causing it to become inconsistent with the information
>>     stored in the hibernation image.
>>
>>     The user-space-driven hibernation (s2disk) is not covered by this
>>     change, because the freezing of filesystems prevents s2disk from
>>     accessing device special files it needs to do its job.
>>
>>     This change is based on earlier work by Nigel Cunningham.
>>
>>     Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
>>
>>     Rebased to 3.3-rc3 by Josh Boyer <jwboyer@...hat.com>

Did this patch ever wind up going anywhere?  Fedora has it sitting in
our tree with a comment that says "rebase" and I don't see it in the
linux-next tree at all.

Did if fall through the cracks or was it NAKed somewhere?

josh
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